Petri dish



FIG. 1 is a perspective view of a petri dish, showing our new design;

FIG. 2 is another perspective view thereof in an open configuration;

FIG. 3 is a front view of the petri dish in a closed configuration;

FIG. 4 is a rear view thereof;

FIG. 5 is a side view thereof, the opposite side being a mirror image; and,

FIG. 6 is a top view thereof. 

CLAIM We claim, the ornamental design for a petri dish, as shown and described. 